Interaction of saline water and nitrogen on the partitioning and statistical correlation of mineral elements in maize plants
2004
Irshad, M. | Honna, T. | Yamamoto, S. | KAto, M. | et al.,
Saline irrigation water has a tremendous impact on the yield potential of crops. The distribution of mineral elements and their ratios in maize plant organs in response to saline water and nitrogen (N) nutrition was studied in a pot experiment for six weeks. The plants were separated into leaf, stalk and root and analysed for calcium (Ca), magnesium (Mg), sodium (Na), potassium (K) and chloride (Cl) contents. The partitioning and ratios of mineral nutrients in plants were significantly affected by water salinity and nitrogen level. In saline water the roots contained the highest Na content; Ca and Mg were higher in the leaf, whereas K and Cl were highest in the stalk. In non-saline water, Na and Cl were highest in the root and the remaining elements were greatest in the stalk. The K and Cl contents were significantly reduced by an increase in the N level, whereas the reverse was true for the Ca, Mg and Na contents. An inverse relationship was noted for the plant biomass versus both Na uptake and the Na/Ca, Na/Mg and Na/K ratios in plants irrigated with saline water. The mineral elements, with the exception of K, appeared to be highly correlated in the plant parts.
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